PARTIAL DISCONNECTION DETECTOR

To provide a partial disconnection detector which can detect the occurrence of partial disconnection without detecting an electric circuit current.SOLUTION: The partial disconnection detector includes a measuring unit 2 which acquires waveform information of an AC voltage applied to an electric wire L and divides one cycle into 200 parts to output voltage value information at respective division points, a determination unit 3 which determines the occurrence of partial disconnection of the electric wire L on the basis of the voltage value information at the division points which is outputted by the measuring unit 2, and a display unit 5 which, when the determination unit 3 determines the occurrence of partial disconnection, indicates the occurrence of partial disconnection. The determination unit 3 calculates variation between voltages at adjacent division points in accordance with the voltage value information at the division points and, if an absolute value of the variation exceeds a prescribed threshold, determines the occurrence of partial disconnection.SELECTED DRAWING: Figure 1 【課題】 電路電流を検出することなく半断線の発生を検出できる半断線検出装置を提供する【解決手段】 電線Ｌに印加されている交流電圧の波形情報を入手して、１周期を２００分割して個々の分割点の電圧値情報を出力する計測部２と、計測部２が出力する分割点電圧値情報を基に電線Ｌの半断線発生を判断する判断部３と、判断部３が半断線発生と判断したら、それを通知する表示部５とを有し、判断部３は分割点電圧値情報から隣接する分割点電圧の変化量を算出し、この変化量の絶対値が所定の閾値を超えたら半断線発生と判断する。【選択図】 図１